68 lines
1.8 KiB
Factor
68 lines
1.8 KiB
Factor
USING: help.markup help.syntax math kernel ;
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IN: 24-game
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HELP: play-game ( -- )
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{ $description "Starts the game!" }
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{ $examples
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{ $unchecked-example
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"USE: 24-game"
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"play-game"
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"{ 8 2 1 2 }\n"
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"Commands: { + - * / rot swap q }\n"
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"swap\n"
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"{ 8 2 2 1 }\n"
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"Commands: { + - * / rot swap q }\n"
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"-\n"
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"{ 8 2 1 }\n"
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"Commands: { + - * / rot swap q }\n"
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"+\n"
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"{ 8 3 }\n"
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"Commands: { + - * / swap q }\n"
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"*\n"
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"You WON!"
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}
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} ;
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HELP: 24-able ( -- vector )
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{ $values { "vector" "vector of 4 integers" } }
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{ $description
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"Produces a vector with 4 integers. With the following condition: "
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"If these integers were directly on the stack, one can process them into 24, "
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"just using the provided commands and the 4 numbers. The Following are the "
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"provided commands: "
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{ $link + } ", " { $link - } ", " { $link * } ", "
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{ $link / } ", " { $link swap } ", and " { $link rot } "."
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}
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{ $examples
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{ $example
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"USING: 24-game kernel sequences prettyprint ;"
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"24-able length 4 = ."
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"t"
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}
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{ $notes { $link 24-able? } " is used in " { $link 24-able } "." }
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} ;
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HELP: 24-able? ( quad -- t/f )
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{ $values
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{ "quad" "vector of 4 integers" }
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{ "t/f" "a boolean" }
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}
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{ $description
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"Tells if it is possible to win 24-game if it was initiated "
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"with this sequence."
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} ;
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HELP: build-quad ( -- array )
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{ $values
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{ "array" "an array of 4 numbers" }
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}
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{ $description "Builds an array of 4 random numbers." } ;
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ARTICLE: "24-game" "The Game of 24"
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"A classic math game, where one attempts to create 24, by applying "
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"arithmetical operations and some shuffle words to a stack of 4 numbers. "
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{ $subsection play-game }
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{ $subsection 24-able }
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{ $subsection 24-able? }
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{ $subsection build-quad } ;
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ABOUT: "24-game"
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